[v2,06/10] linux/random.h: Mark CONFIG_ARCH_RANDOM functions __must_check

Commit Message

Richard Henderson Nov. 6, 2019, 2:13 p.m. UTC

We must not use the pointer output without validating the
success of the random read.

Reviewed-by: Ard Biesheuvel <[e-mail]>
Signed-off-by: Richard Henderson <[e-mail]>
---
 include/linux/random.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Patch

diff --git a/include/linux/random.h b/include/linux/random.h
index ea0e2f5f1ec5..d319f9a1e429 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -167,19 +167,19 @@  static inline void prandom_seed_state(struct rnd_state *state, u64 seed)
 #ifdef CONFIG_ARCH_RANDOM
 # include <asm/archrandom.h>
 #else
-static inline bool arch_get_random_long(unsigned long *v)
+static inline bool __must_check arch_get_random_long(unsigned long *v)
 {
 	return false;
 }
-static inline bool arch_get_random_int(unsigned int *v)
+static inline bool __must_check arch_get_random_int(unsigned int *v)
 {
 	return false;
 }
-static inline bool arch_get_random_seed_long(unsigned long *v)
+static inline bool __must_check arch_get_random_seed_long(unsigned long *v)
 {
 	return false;
 }
-static inline bool arch_get_random_seed_int(unsigned int *v)
+static inline bool __must_check arch_get_random_seed_int(unsigned int *v)
 {
 	return false;
 }